Affiliation:
1. Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
2. School of Chemical Sciences University of Chinese Academy of Sciences Beijing 100049 China
Abstract
AbstractThe thermoelectric (TE) performance of organic materials is limited by the coupling of Seebeck coefficient and electrical conductivity. Herein a new strategy is reported to boost the Seebeck coefficient of conjugated polymer without significantly reducing the electrical conductivity by incorporation of an ionic additive DPPNMe3Br. The doped polymer PDPP‐EDOT thin film exhibits high electrical conductivity up to 1377 ± 109 S cm−1 but low Seebeck coefficient below 30 µV K−1 and a maximum power factor of 59 ± 10 µW m−1 K−2. Interestingly, incorporation of small amount (at a molar ratio of 1:30) of DPPNMe3Br into PDPP‐EDOT results in the significant enhancement of Seebeck coefficient along with the slight decrease of electrical conductivity after doping. Consequently, the power factor (PF) is boosted to 571 ± 38 µW m−1 K−2 and ZT reaches 0.28 ± 0.02 at 130 °C, which is among the highest for the reported organic TE materials. Based on the theoretical calculation, it is assumed that the enhancement of TE performance for the doped PDPP‐EDOT by DPPNMe3Br is mainly attributed to the increase of energetic disorder for PDPP‐EDOT.
Funder
National Natural Science Foundation of China
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry
Cited by
3 articles.
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